1. Department of Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Yokohama 223-8522, Japan, Department of Applied Chemistry, National Defense Academy, 1-10-20 Hashirimizu, Yokosuka 239-8686, Japan, and Kanagawa Academy of Science and Technology, KSP, 3-2-1 Sakado, Kawasaki 213-0012, Japan